Compressors of chiller trip upon starting

[Elec777]

Gentelmen,
At our project we have 2chillers 90tons cooling capcity ,i supplied it with power from 1600kva transforer 20/0.4kv,50HZ,6.4, oil type
there are another residential 1000amps
Load connected to the transformer ,according to my study the required cable size for 80m lengeth from the TR to the chiller panel is 3*150+95NYY for each chiller ,the problem is that:since each chiller has 4 compressors and it start and stop frequently it
Trips ,should i increase the cable size?the maximum current drawn by one chiller(4compressors running) is
200amps
Thanks in advance

 

[dArsonval]

I highly doubt my experienced guess here. Yet put it forth.
Noting the equipment decal in an earlier post denotes the apparatus is rated as a single voltage device.
I’m wondering if it left the factory with the motor connected to operate at a different voltage.
Stranger things have happened.

John